The justification used for banning public use and heavy "sin" taxes on traditional cigarettes is harm and cost to society. They give tax breaks to other alternatives that are considered beneficial - such as the example given earlier about alternative fuel cars - rather than the same punitive actions they give the harmful version. The reason is to give people incentive to use the less harmful version. There's no reason the same argument couldn't be made for e-cigarettes.
I agree, but the FDA already lost the fight to designate e-cigs as a form of nicotine replacement therapy. To me e-cigs are a far superior alternative than the patches and the gum and Zyban (I've tried them all with no success......vaping has gotten me to cutting my regular cigarette intake in half in a span of a week). In the end, if the FDA were to be able to classify e-cigs as such then that would have given them the power to ban them. I know it doesn't make much sense but regulating them as tobacco products is the lesser of two evils.